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Particle size distribution and zeta measurement profile of native (a,b) and vascular endothelial growth factor-conjugated poly-lactic-co-glycolic acid nanoparticles (VEGF-PLGA-NPs) (c,d). Data are three different measurements made by the instrument on the same sample. (a) Size distribution of PLGA-NPs; (b) zeta potential distribution of PLGA-NPs; (c) size distribution of VEGF-PLGA-NPs; (d) zeta potential distribution of VEGF-PLGA-NPs.
